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Posted to common-user@hadoop.apache.org by C G <pa...@yahoo.com> on 2008/05/25 05:03:42 UTC

"firstbadlink is/as" messages in 0.16.4

Hi All:
   
  So far, running 0.16.4 has been a bit of a nightmare.  The latest problem I'm seeing concerns a series of odd messages concerning "firstbadlink".   I've attached one of these message sequences.  I'm curious what it's trying to tell me.  This is from the master node, but the same pattern also occurs on all the slaves as well.
   
  Thanks for any insight...
  C G
   
  2008-05-24 22:35:00,170 INFO org.apache.hadoop.dfs.DataNode: Receiving block blk_-5166040941538436352 src: /10.2.13.1:41942 dest: /10.2.13.1:50010
2008-05-24 22:35:00,283 INFO org.apache.hadoop.dfs.DataNode: Datanode 2 got response for connect ack  from downstream datanode with firstbadlink as
2008-05-24 22:35:00,283 INFO org.apache.hadoop.dfs.DataNode: Datanode 2 forwarding connect ack to upstream firstbadlink is
2008-05-24 22:35:00,313 INFO org.apache.hadoop.dfs.DataNode: Received block blk_-5166040941538436352 of size 427894 from /10.2.13.1
2008-05-24 22:35:00,313 INFO org.apache.hadoop.dfs.DataNode: PacketResponder 2 for block blk_-5166040941538436352 terminating

Re: "firstbadlink is/as" messages in 0.16.4

Posted by Dhruba Borthakur <dh...@gmail.com>.
This "firstbadlink" was an mis-configured log message in the code. It
is innocuous and has since been fixed in 0.17 release.
http://issues.apache.org/jira/browse/HADOOP-3029

thanks,
dhruba

On Sat, May 24, 2008 at 7:03 PM, C G <pa...@yahoo.com> wrote:
> Hi All:
>
>  So far, running 0.16.4 has been a bit of a nightmare.  The latest problem I'm seeing concerns a series of odd messages concerning "firstbadlink".   I've attached one of these message sequences.  I'm curious what it's trying to tell me.  This is from the master node, but the same pattern also occurs on all the slaves as well.
>
>  Thanks for any insight...
>  C G
>
>  2008-05-24 22:35:00,170 INFO org.apache.hadoop.dfs.DataNode: Receiving block blk_-5166040941538436352 src: /10.2.13.1:41942 dest: /10.2.13.1:50010
> 2008-05-24 22:35:00,283 INFO org.apache.hadoop.dfs.DataNode: Datanode 2 got response for connect ack  from downstream datanode with firstbadlink as
> 2008-05-24 22:35:00,283 INFO org.apache.hadoop.dfs.DataNode: Datanode 2 forwarding connect ack to upstream firstbadlink is
> 2008-05-24 22:35:00,313 INFO org.apache.hadoop.dfs.DataNode: Received block blk_-5166040941538436352 of size 427894 from /10.2.13.1
> 2008-05-24 22:35:00,313 INFO org.apache.hadoop.dfs.DataNode: PacketResponder 2 for block blk_-5166040941538436352 terminating
>
>
>
>